Analysis Dynamic Response of Pile-Soil-Water Coupling of Large Span Cable-Stayed Bridge in Multipoint Excitation

Abstract

Computed Ruiz and Penzien power spectrum model of Sutong bridge site, used the multi-point excitation response analysis method to long span bridge, the additional mass method considering the fluid effect and equivalent viscoelastic boundary method considering the soil effect. As a result, for the pile - soil - water - structure model, the internal force of main tower of Sutong bridge response decreased tendency, the peak of tower internal force response had certain phase difference effect. In addition, different structure types of the bridge by the traveling wave effect the influence degree is different, some parts of the reaction may be increased ,the other may be reduced, so analyzing response of the long span cable-stayed bridge must be consider the traveling wave, the coherent and the local effect.